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