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