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