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