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