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