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