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