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