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