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