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)(11,13)(12,14)(15,16)(17,18,21,27,22,26,34,24)(19,23,30,35,28,37,43,38)(20,31,33,39,32,25,40,41)(29,44,45,48,42,36,47,46)(1,3,5,8)(2,6,4,7)(9,10)(11,15)(12,14)(13,16)(17,19)(18,23)(20,29)(21,30)(22,28)(24,38)(25,36)(26,37)(27,35)(31,44)(32,42)(33,45)(34,43)(39,48)(40,47)(41,46)(1,2,5,4)(3,6,8,7)(9,11,12,16)(10,13,14,15)(18,24)(19,28)(20,32)(21,34)(23,35)(25,41)(26,27)(31,39)(36,48)(37,38)(44,46)(45,47)(3,8)(6,7)(11,16)(13,15)(17,20)(18,25)(19,29)(21,33)(22,32)(23,36)(24,39)(26,31)(27,41)(28,42)(30,45)(34,40)(35,46)(37,44)(38,48)(43,47) involution — undirected(1,4,5,2)(3,7,8,6)(10,14)(13,15)(18,26)(20,32)(23,37)(24,27)(29,42)(33,40)(35,38)(45,47)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.