One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,6,8)(3,10,5,7)(4,12,14,9)(11,15,13,16)(17,18,23,26)(19,24,27,21)(20,22,25,31)(28,29,32,30)(33,34,38,40)(35,41,43,36)(37,39,46,45)(42,47,48,44)(1,3,6,5)(2,7,8,10)(4,13,14,11)(9,16,12,15)(17,19)(18,24)(20,28)(21,26)(22,29)(23,27)(25,32)(30,31)(33,35,38,43)(34,36,40,41)(37,42,46,48)(39,44,45,47)(2,8)(7,10)(9,12)(15,16)(19,27)(21,24)(28,32)(29,30)(33,36,38,41)(34,35,40,43)(37,44,46,47)(39,42,45,48)(1,4)(2,9)(3,11)(5,13)(6,14)(7,15)(8,12)(10,16)(17,20)(18,22)(19,28)(21,30)(23,25)(24,29)(26,31)(27,32)(33,34)(35,36)(37,45)(38,40)(39,46)(41,43)(42,47)(44,48) involution — undirected(1,2)(3,10)(4,9)(5,7)(6,8)(11,16)(12,14)(13,15)(17,21)(18,19)(20,30)(22,28)(23,24)(25,29)(26,27)(31,32)(33,36)(34,35)(37,44)(38,41)(39,42)(40,43)(45,48)(46,47) involution — undirected(1,5,6,3)(2,7,8,10)(4,11,14,13)(9,16,12,15)(17,22)(18,25)(19,29)(20,26)(21,28)(23,31)(24,32)(27,30)(33,37,38,46)(34,39,40,45)(35,42,43,48)(36,44,41,47)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.