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