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