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