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