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