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