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