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