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