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