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