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