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