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