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