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