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