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