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