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