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