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