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