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