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