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