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