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