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