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