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