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