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