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