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