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