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