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