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