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