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