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