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