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