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)(21,22,27,30)(23,25,29,26)(24,32,36,31)(28,34,33,35)(6,11)(7,9)(12,14)(13,19)(15,18)(16,20)(21,23)(22,25)(24,33)(26,30)(27,29)(28,36)(31,34)(32,35) involution — undirected(2,4)(5,7,10,9)(6,12,14,11)(8,15,17,18)(13,16,20,19)(21,24,27,36)(22,28,30,33)(23,31,29,32)(25,34,26,35)(5,8,10,17)(6,13,14,20)(7,15,9,18)(11,19,12,16)(21,25,27,26)(22,29,30,23)(24,34,36,35)(28,32,33,31)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.