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