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