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