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