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