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