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