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