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