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