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