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