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