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