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)(9,19)(10,12)(13,17)(14,16)(18,20)(21,22,24,26)(23,29,31,27)(25,28,32,34)(30,35,33,36)(1,3,4,2)(5,7,16,18,10,17,9,8)(6,11,19,13,12,20,14,15)(22,26)(23,30)(25,32)(27,35)(29,36)(31,33)(2,3)(6,12)(7,17)(8,18)(14,19)(21,23,24,31)(22,27,26,29)(25,33,32,30)(28,35,34,36)(5,8,9,17,10,18,16,7)(6,13,14,11,12,15,19,20)(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.