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