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