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