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