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