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)(7,15,16,11,18,19,17,20)(21,22,26,29,25,28,34,36)(23,24,31,33,30,32,27,35)(1,2,3,4)(5,7)(6,11)(8,16)(9,17)(10,18)(12,15)(13,19)(14,20)(21,23,26,31,25,30,34,27)(22,24,29,33,28,32,36,35)(6,12)(8,9)(11,15)(13,14)(16,17)(19,20)(21,24)(22,27)(23,29)(25,32)(26,33)(28,31)(30,36)(34,35) involution — undirected(5,8,10,9)(6,12,14,13)(7,16,18,17)(11,15,20,19)(23,30)(24,32)(27,31)(33,35)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.