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