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