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