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