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