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