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