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