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