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