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