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