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