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