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