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