One vertex per element, one color per generator, with an edge from x to x·s.
(2,3)(5,6)(7,13)(8,17)(9,12)(10,18)(11,15)(14,16)(19,20)(21,22,25,27)(23,31,34,36)(24,30,26,29)(28,32,35,33)(1,2,4,3)(5,7,9,15)(6,11,12,13)(8,14,18,19)(10,16,17,20)(22,27)(23,32)(24,26)(28,31)(33,34)(35,36)(5,8,17,6,9,18,10,12)(7,14,20,11,15,19,16,13)(21,23,26,32,25,34,24,33)(22,28,30,36,27,35,29,31)(1,3,4,2)(6,12)(7,15)(8,18)(16,20)(21,24,25,26)(22,29,27,30)(23,33,34,32)(28,31,35,36)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.