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