One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,4,8,5,7,13,15)(3,9,10,16,11,6,12,14)(17,18,22,27,20,25,35,26,23,28,38,43,36,44,21,37)(19,29,32,41,34,45,48,39,33,46,47,24,30,40,31,42)(1,3,5,11)(2,6,7,9)(4,12,13,10)(8,16,15,14)(17,19,23,33)(18,24,28,41)(20,30,36,34)(21,32,35,47)(22,31,38,48)(25,39,44,42)(26,45,37,40)(27,46,43,29)(2,7)(6,9)(8,15)(14,16) involution — undirected(17,20,23,36)(18,25,28,44)(19,30,33,34)(21,22,35,38)(24,39,41,42)(26,43,37,27)(29,40,46,45)(31,47,48,32)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.