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