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