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