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