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