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