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