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