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