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