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