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