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