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