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