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