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