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