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