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