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