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