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