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