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