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