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