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