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