One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,6)(3,7,9,10)(4,8,12,13)(11,14,15,16)(17,18,23,26)(19,24,27,22)(20,21,25,32)(28,29,30,31)(33,34,39,38)(35,43,45,40)(36,46,47,41)(37,48,44,42)(2,6)(3,9)(8,13)(11,15)(17,19,23,27)(18,24,26,22)(20,30,25,28)(21,31,32,29)(33,35,39,45)(34,40,38,43)(36,44,47,37)(41,42,46,48)(4,12)(8,13)(11,15)(14,16)(19,27)(22,24)(28,30)(29,31)(33,36,39,47)(34,41,38,46)(35,44,45,37)(40,42,43,48)(1,2)(3,10)(4,8)(5,6)(7,9)(11,16)(12,13)(14,15)(17,20)(18,21)(19,28)(22,31)(23,25)(24,29)(26,32)(27,30)(33,37)(34,42)(35,36)(38,48)(39,44)(40,46)(41,43)(45,47) involution — undirected(1,3)(2,7)(4,11)(5,9)(6,10)(8,14)(12,15)(13,16)(17,21)(18,25)(19,29)(20,26)(22,28)(23,32)(24,30)(27,31)(33,35)(34,40)(36,44)(37,47)(38,43)(39,45)(41,42)(46,48) involution — undirected(1,4,5,12)(2,8,6,13)(3,11,9,15)(7,14,10,16)(17,22)(18,19)(20,31)(21,28)(23,24)(25,29)(26,27)(30,32)(33,38,39,34)(35,43,45,40)(36,41,47,46)(37,48,44,42)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.