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