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