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