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