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