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