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