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