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