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