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