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