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