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