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