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