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