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