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