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