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