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