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