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