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