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