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