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